Mindray DC-28 User Manual

Hardware Principle 4-3
4.2.3 Main board
The main board could be divided into two parts: front-end of the main board and
back-end of the main board.
4.2.3.1 Front-end of the main board
Main board
HVISO
32ch
BF FPGA
Control signal
DATA
DSP
FPGA
High-voltage control signal
IQ
DDR2
UPLOAD
DDR2
PCIE X1
CPLD control signal
Rx9~
16
Rx25~32
Rx1~8
…
...
LVDS*8
Tx9~16
Tx25~32
Tx1~8
Probe
board
PCIE
PHY
Communication
control bus
Control
signal
…
...
High-voltage
pulse output
circuit
Drive
circuit
Tx
TGC
8-channel digital
LNA VGA ADC
Rx
8-channel analog
Control signal
Control signal
CPU Module
Clock
circuit
Clock
Clock
Probe
connect
ing
board
Figure 4-3 Principle Diagram of Front-end of the Main Board
As shown in the figure above, ultrasound front-end internal structure consists of
ultrasound reception module（Rx1~Rx32）, ultrasound transmission module（Tx1~Tx32）,
high-voltage isolation module（HVISO）, BF FPGA module, DSP FPGA
module ,PCIE_PHY module and so on.
Function describes as following:
 Support 32 channel high-voltage isolation（HVISO）to protect ultrasound
reception module（Rx）to avoid ultrasound transmission high-voltage
contamination；
 32 channel transmission wave forms according to scanning time sequence and
control parameters.
 32 channel transmission wave forms to 32 channel high-voltage transmission
wave by driver.
 Echo receiving LNA is to enlarge fixed gain.
 By the control of TGC, echo receiving carries out variable gain amplification by
depth.
 32 channel analog echo could be switched to 32 channel digital signal by ADC.

Mindray DC-28 Specifications

General

Brand	Mindray
Model	DC-28
Category	Medical Equipment
Language	English